US Bridges

RTE 77 over Tonawanda Creek

Fair

Genesee County, New York · JCT Rt 77 & Tonawanda Ck · Structure no. 000000001030090

Built
1987
38 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
170 ft
2 main spans
Daily traffic
5,854
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 77 over Tonawanda Creek is a steel continuous stringer/multi-beam or girder carrying RTE 77 over Tonawanda Creek in Genesee County, New York. It was built in 1987, so it is 38 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,854 vehicles a day, roughly 18% of them trucks, projected to reach 5,909 by 2041. The structure is 170 ft (51.8 m) long and 40 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesRTE 77
CrossesTonawanda Creek
LocationJCT Rt 77 & Tonawanda Ck
RouteState Highway 77
CountyGenesee County
StateNew York
Coordinates43.0273, -78.39747
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107 US tons
Inventory rating64 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length170 ft (51.8 m)
Longest span84 ft (25.6 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,854 (2020)
Projected traffic5,909 by 2041
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$3.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 77 over Tonawanda Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is RTE 77 over Tonawanda Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does RTE 77 over Tonawanda Creek carry?

About 5,854 vehicles per day (2020 count), of which roughly 18% are trucks.

How long is RTE 77 over Tonawanda Creek?

The structure is 170 ft (51.8 m) long with a longest span of 84 ft (25.6 m) and a deck 40 ft wide.

Who owns RTE 77 over Tonawanda Creek?

It is owned by the State Highway Agency.